Dr. Kejian Song is currently an Associate Professor at the School of Electrical Engineering, Beijing Jiaotong University, BJTU. In June 2017, he graduated from BJTU with a PhD in Electrical Engineering. From 2014 to 2015, he went to the University of New South Wales, UNSW Australia as an Exchanged Ph.D. Student sponsored by China Scholarship Council. His research focuses on power electronics, power quality, and high power protection in traction power supply systems as well as locomotive electrical systems.